ifx_query

(PHP 4, PHP 5 < 5.2.1)

ifx_query — Send Informix query

说明

ifx_query ( string $query , resource $link_identifier [, int $cursor_type [, mixed $blobidarray ]] ) : resource

Sends a query to the currently active database on the server that's associated with the specified link identifier.

For "select-type" queries a cursor is declared and opened. Non-select queries are "execute immediate".

For either query type the number of (estimated or real) affected rows is saved for retrieval by ifx_affected_rows().

If the contents of the TEXT (or BYTE) column allow it, you can also use ifx_textasvarchar(1) and ifx_byteasvarchar(1). This allows you to treat TEXT (or BYTE) columns just as if they were ordinary (but long) VARCHAR columns for select queries, and you don't need to bother with blob id's.

With ifx_textasvarchar(0) or ifx_byteasvarchar(0) (the default situation), select queries will return BLOB columns as blob id's (integer value). You can get the value of the blob as a string or file with the blob functions (see below).

参数

query

The query string.

link_identifier

The link identifier.

cursor_def

This optional parameter allows you to make this a scroll and/or hold cursor. It's a bitmask and can be either IFX_SCROLL, IFX_HOLD, or both or'ed together. I you omit this parameter the cursor is a normal sequential cursor.

blobidarray

If you have BLOB (BYTE or TEXT) columns in the query, you can add a blobidarray parameter containing the corresponding "blob ids", and you should replace those columns with a "?" in the query text.

返回值

Returns valid Informix result identifier on success, or FALSE on errors.

范例

Example #1 Show all rows of the "orders" table as a HTML table

<?php
ifx_textasvarchar(1);      // use "text mode" for blobs
$res_id = ifx_query("select * from orders", $conn_id);
if (! $res_id) {
    printf("Can't select orders : %s\n<br />%s<br />\n", ifx_error(), ifx_errormsg());
    die;
}
ifx_htmltbl_result($res_id, "border=\"1\"");
ifx_free_result($res_id);
?>

Example #2 Insert some values into the "catalog" table

<?php

// create blob id's for a byte and text column
$textid = ifx_create_blob(0, 0, "Text column in memory");
$byteid = ifx_create_blob(1, 0, "Byte column in memory");

// store blob id's in a blobid array
$blobidarray[] = $textid;
$blobidarray[] = $byteid;

// launch query
$query = "insert into catalog (stock_num, manu_code, " .
         "cat_descr,cat_picture) values(1,'HRO',?,?)";
$res_id = ifx_query($query, $conn_id, $blobidarray);
if (! $res_id) {
    /* ... error ... */
}

// free result id
ifx_free_result($res_id);
?>

参见